So I'm hoping for a little more help. The above guide worked perfectly the first time. Then there was an update to CM 12 so I wanted to try it out--not for me.
So now I want to go back to f2fs. I repeat the steps above and the rom flashes fine but i can't get the kernel to flash. It just boots me right back to twrp screen. I'm not sure what info to provide. There's no error. Any help is appreciated!
***Actually there is an error. When I attempted to format data in step 2 I get "E: Unknown MTP message type: 1" Hope that helps. And of course after rebooting it lets me flash the rom but not the kernel.
I'm not sure. Make sure the data really did format to f2fs and reboot after doing it, and check it again. Sometimes the partition didn't say f2fs after formatting it. Otherwise, maybe the update isn't compatible. I no longer have the hd, so I can't test it.